Stop-motion.



J. MOGINNIS.

STOP MOTION.

urmoumn FILED MAY 25,1999.

Patented Oct. 4, 1910.

2 SHEETS-SHEET 1.

A TTOHNEYS 1n: NORRIS P2750 c1. wAsnmnmN, n :4

J. MOGINNIS.

STOP MOTION.

APPLIOATION FILED MAY 25,1909.

Patented Oct. 4, 1910.

2 BHEBTS-SHEET 2.

WITNESSES ATTORNEYS UTTE @Fd Pleglni' JOHN lVIcGINNIS, OF SCRANTON, PENNSYLVANIA.

STOPMOTION.

citizen of the United, States, and a resident of Scranton, in the county of l iaekawanna and State of Pennsylvania, have invented a, new and Improved Stop-Motion, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved stop motion, more especially designed for knitting and other machines, and arranged to quickly stop the machine in case any one of the yarns breaks between the spool and the knitting devices.

The invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the improvement as applied to one of two circular knitting machines mounted on the same frame; Fig. 2 is an enlarged side elevation of the improvement; Fig. 3 is a sectional plan view of the same on the line 3-3 of Fig. 2; Fig. 4 is an enlarged side elevation of the improvement, parts being in section; Fig. 5 is a side elevation of the same, showing the spring-pressed band wheel released by the releasing arm; Fig. 6 is a plan view of the band wheel and releasing arm; Fig. 7 is a cross section of the improvement on the line 77 of Fig. 4; Fig. 8 is a like view of the same showing the parts in a different position; and Fig. 9 is a similar view of the same, showing the parts in a tripped position.

On the frame A of the double knitting ma chine is journaled a driven shaft B, provided at one end with a pulley O, connected by a belt with other machinery, for impart ing a continuous rotary motion to the shaft B. On the latter is secured a pulley D, over which passes a belt E, also passing over fast and loose pulleys F and F held on the main shaft G of the knitting machine, and geared with the usual knitting devices H, of any approved construction, to actuate the same. The belt E is adapted to be shifted from the fast pulley F onto the loose pulley F whenever a defect occurs in the knitting fabric, and for this purpose a belt shifter I is pro- Specification of Letters Patent.

Application fi1ed May 25, 1909.

Patented Oct. 4, 1910.

Serial No. 498,190.

vided, controlled by the detector J actuated by the knitting devices H in case of a defect, it being understood. that the machine so far described is that of well known construction, so that further detailed (lCSCllplllOll of the same is not deemed necessary.

Now in order to actuate the shifting device I for shifting the belt E from the fast pulley F onto the loose pulley F, in case a yarn K breaks between the spool K and the knitting devices II, the following arrangement is made: Each of the yarns K after leaving the spool K passes through an eye K then over a rod K then down and through an eye K and then up to the knitting devices H, to be acted on, for forming the fabric in the usual manner. Each yarn K between the rod K and the eye K is engaged by a hook L of a pin L, mounted to slide in a bearing L attached to a support A, forming part of the frame A. Normally the pin L is held in a raised position by the yarn K, but when the yarn K breaks the pin drops down, as illustrated to the right in Fig. 2. The normally raised pin L is out of the path of the longitudinalyextending bar N of a rock arm N, mounted to rock in suitable bearings A forming part of the main frame A, but when a yarn breaks and the pin drops down, it moves into the path of the bar N, thus arresting the rocking motion of the rock arm N. On the right-hand end of the rock arm N is secured a releasing arm O in the form of a spring plate, the tension of which is increased by a spring O, and from the free end of the releasing arm O depends a tooth O normally engaging an aperture or a recess P formed in the top face of a horizontally-disposed band wheel P, having its shaft P extending vertically and journaled in suitable bearings arranged on the main frame A. On the upper end of the shaft P (see Fig. 1) is secured an arm Q connected by a link Q with an arm Q secured on the shaft J of the detector J, so that when the shaft P is turned, a rocking motion is given to the shaft J, to actuate the belt shifter I, and thus shift the belt E from the fast pulley F onto the loose pulley F, to stop the machine. Normally the shaft P and its hand pulley P are held against rotation, owing to the tooth O engaging the recess P, it being understood that the band pulley P is held under tension by the action of a band P secured at one end to the peripheral face of the pulley P and connected at its other end with a spring P" held on the frame A. Now when the releasing arm 0 is lifted and the tooth O disengages the recess P, then the band pulley P is released and the spring P and band P rotate the pulley and the shaft P for the arm Q, link Q and arm Q to turn the shaft J of the detector J, to actuate the belt shifter I, as before mentioned. The releasing arm 0 rests with its under side against the flat heel R of a tripping lever B, fulcrumed on a pin N held axially on the right-hand end of the rocking arm N, as plainly shown in the drawings. The tripping lever B is provided with an elongated slot R into which projects a wrist pin S held radially adjustable on a crank disk S, the shaft S of which is journaled in suitable bearings on the main frame A, and carries a pulley T connected by a belt T (see Fig. 1) with a pulley T on the driven shaft B. The rotary motion of the driven shaft B is transmitted to the shaft S by the pulley T belt T and pulley T, and the crank disk S and its wrist pin S impart a continuous rocking motion to the tripping lever R, so that a rocking motion is given to the rock arm N owing to the releasing arm O engaging the flat heel R of the tripping lever B (see Figs. 7 and 8). Now when the rock arm N is arrested by the dropping pin L, the yarn K of which has been broken, then the rocking tripping lever R swings the releasing arm 0 upward by the action of its heel R, as indicated in Fig. 9, whereby the tooth O is withdrawn from the recess P and consequently the band pulley P is released and now rotates by the action of its hand P and the spring P As previously explained, the rotary motion given to the band pulley P and to the shaft P causes the actuating of the shaft J and the shifting mechanism I, to move the belt E from the fast pulley F to the loose pulley F to stop the machine. The under side of the band pulley P is provided with a stop pin P adapted to engage a fixed stop P on the frame A, to stop the band pulley P after it has been turned a sufficient distance by the action of the spring 1 as above explained.

From the foregoing it will be seen that the machine is instantly stopped as soon as a knitting yarn breaks between the yarn spool and the knitting devices.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent:

1. A stop motion for knitting and other machines, comprising a continually rocking tripping lever, a rock arm having a releasing arm engaging the said tripping lever for the latter to normally rock the said rock arm, means suspended on the yarn and adapted to arrest the motion of the rock arm on the breaking of the yarn, a stopping mechanism and actuating means connected with the mechanism and normally locked against movement by the said releasing arm, the said tripping lever disengaging the said releasing arm from the said actuating means on stopping the said rock arm.

2. A stop motion for knitting and other machines, comprising a continually rocking tripping lever, a rock arm with which the tripping lever is loosely connected and having a releasing arm engaging the said tripping lever to permit the rocking movement of the tripping lever to be imparted to the rock arm, a yarn-carried pin normally out of the path of the said rock arm and adapted to arrest the motion of the rock arm on the breaking of the yarn, a stopping mechanism and a spring-pressed member connected with the stopping mechanism and normally held against movement by the said releasing arm, the said tripping lever disengaging the releasing arm from the spring pressed member when the rock arm is stopped.

3. A stop motion for knitting and other machines, comprising a rock arm, means hung suspended from the yarn and adapted to arrest the rock arm, a releasing arm car ried by the rock arm, and a continually rocking tripping lever fulcrumed on the rock arm and engaged by the releasing arm, whereby the movement of the tripping lever will be imparted to the rock arm until the latter is arrested when the releasing arm will be operated by said tripping lever.

4. A stop mot-ion for knitting and other machines, comprising a slotted tripping lever having a. flat heel, a crank arm having its wrist pin extending into the slot of the said tripping lever to rock the latter, a rock arm carrying a spring-releasing arm provided with a tooth, the arm resting on the said flat head of the tripping lever, a stopping mechanism, a spring-pressed band wheel connected with the stopping mechanism and having a recess for engagement by the said tooth, and a pin having a hook hung on a yarn, the pin being adapted to drop into the path of the said rock arm to arrest the latter on the breaking of the yarn.

5. A stop motion for knitting and other machines, comprising a slotted tripping lever having a flat heel, a crank arm having its wrist pin extending into the slot of the said tripping lever to rock the latter, a rock arm carrying a spring-releasing arm provided with a tooth, the arm resting on the said flat heel of the tripping lever, a stopping mechanism, a spring-pressed band wheel connected with the stopping mechanism and having a recess for engagement by the said tooth, a pin having a hook hung on a yarn, the pin being adapted to drop into the path of the said rocking arm to arrest the latter on the breaking of the arm, and an overhead guideway for the pin to slide in.

6. A stop motion for knitting and other machines, comprising a shifting mechanism for the driving gear of the machine, a springpressed band Wheel having its shaft connected With the said shifting mechanism, a rock arm having a spring-releasing arm ongaging the said band Wheel to normally hold the same in position against the tension of its spring, a tripping lever fulcrumed on the said rock arm and normally held in place by the said releasing arm, means for imparting a to and fro swinging motion to the said tripping lever, to rock the said rock arm by means of the said spring-releasing arm, and pins suspended on the arms and normally clearing the said rock arm, the pin on the breaking of the yarn arresting the motion of the said rock arm, to cause the tripping lever to disengage the said releasing arm from the spring-pressed band Wheel, for the latter to actuate the shifting mechanism and thus stop the machine.

In testimony whereof I have signed my name to this specification in the presence of tWo subscribing Witnesses.

JOHN MoGTNNIS.

Vi tnesses JOHN E. Lorj'l's, CHAS. C. GnoA'l. 

